@mixin fixed($zindex: 1, $left: 0, $right: 0, $top: 0, $bottom: 0) {
  position: fixed;
  left: $left;
  right: $right;
  top: $top;
  bottom: $botto;
  z-index: $zindex;
}

@mixin absolute($zindex: 1, $left: 0, $right: 0, $top: 0, $bottom: 0) {
  position: absolute;
  left: $left;
  right: $right;
  top: $top;
  bottom: $botto;
  z-index: $zindex;
}